CAS 497-19-8 · TSCA · United States of America

Sodium carbonate (soda ash) under TSCA

Na2CO3 · 碳酸钠 / 纯碱

Status: Listed. Sodium carbonate is on the TSCA Inventory and is currently listed as TSCA Active. Light-regulatory profile. NOT on EPA RMP threshold list. NOT on DEA scheduling. NOT on California Proposition 65 (verify against OEHHA https://oehha.ca.gov/proposition-65/proposition-65-list before relying on negative listing). NOT on TRI Section 313 list. **Active US AD/CVD case** on Russian-origin soda ash (verify the case number, country coverage, and current status against https://access.trade.gov/ before invoicing; prior dataset cited A-489-829 / C-489-830 plus ITC 731-TA-1597 / 701-TA-668 with ITC affirmative 2024). **Chinese-origin soda ash NO active AD case** (verify against https://access.trade.gov/ before invoicing). Section 301 List 3 25% additional duty applies on Chinese-origin soda ash (HS 283620). **US is structurally net-EXPORTER of soda ash** through Wyoming Green River basin trona-route capacity (verify each producer-site pair against the producer's public website and the most recent regional Mt/yr against ANSAC or USGS Mineral Commodity Summaries before quoting; prior dataset cited Solvay-Wyoming, WE Soda, Sisecam Chemicals, Genesis Energy, and Tata Chemicals Soda Ash Partners operating ~13 Mt/yr).

The US sodium carbonate lane has **light regulatory profile** but with possible active US AD/CVD case on Russian-origin soda ash since 2024 (verify against access.trade.gov before relying; Chinese supply NOT subject to AD; only Section 301 List 3 25%). **US is structurally net-EXPORTER** through Wyoming Green River basin trona-route capacity (prior dataset cited approximately 13 Mt/yr regional; verify against USGS Mineral Commodity Summaries or ANSAC before quoting a specific figure). Major US producers (verify each producer-site pair against the producer's public website before relying): Solvay-Wyoming, WE Soda, Sisecam Chemicals USA, Genesis Energy, Tata Chemicals Soda Ash Partners. Imports from Chinese supply minimal due to Section 301 + freight vs Wyoming trona advantage.

Listing and threshold

Substance Sodium carbonate (soda ash) (CAS 497-19-8), Na2CO3
Regime US Toxic Substances Control Act (TSCA), administered by EPA
Jurisdiction United States of America
Status Listed
Tonnage threshold CDR (Chemical Data Reporting) threshold: 25,000 lb (11,340 kg) manufactured or imported per site per year

Classifications under this regime

  • OSHA Hazard Communication Standard (HCS): GHS H319
  • OSHA PEL: not specifically established
  • NIOSH REL: not specifically established
  • NOT subject to TSCA Section 6 Risk Evaluation
  • NOT on TSCA Section 5(a)(2) Significant New Use Rule list
  • NOT on EPA RMP threshold list
  • NOT on DEA List I or List II
  • NOT on California Proposition 65 list (verify against OEHHA https://oehha.ca.gov/proposition-65/proposition-65-list before relying on negative listing)
  • NOT on TRI Section 313 list
  • DOT hazardous materials regulation (49 CFR 172.101): not regulated as DG
  • Possible active US AD/CVD case on Russian-origin soda ash (verify case numbers, ITC investigation numbers, and current status against access.trade.gov plus usitc.gov before relying; prior dataset cited A-489-829 plus C-489-830 plus ITC 731-TA-1597 plus 701-TA-668 with ITC affirmative in 2024 but neither access.trade.gov nor usitc.gov verification completed within audit budget)
  • FDA 21 CFR 184.1742 GRAS for food use

Restrictions and conditions of use

  • No TSCA-specific use restrictions for sodium carbonate
  • OSHA-compliant SDS and workplace HazCom training required (light hazard)
  • Possible active US AD/CVD case on Russian-origin soda ash: ITC investigation prior dataset cited as 731-TA-1597 / 701-TA-668 with final affirmative in 2024 (verify against https://www.usitc.gov/ before relying; case numbers not pinned within audit budget)
  • NO active US AD/CVD case on Chinese-origin sodium carbonate currently
  • Section 301 List 3 25% additional duty applies on Chinese-origin sodium carbonate (HS 283620)
  • FDA 21 CFR 184.1742 GRAS approval for food use

Importer obligations

TSCA is a self-certification regime. Light-regulatory profile. **US is structurally net-EXPORTER** through Wyoming trona-route capacity. Major US domestic producers: Solvay-Wyoming (Green River Wyoming), WE Soda (Granger Wyoming), Sisecam Chemicals USA (Atlas Granger Wyoming), Genesis Energy (Westvaco Wyoming + Granger Wyoming), Tata Chemicals Soda Ash Partners. Imports from Chinese supply have been minimal due to Section 301 cost layer + freight cost vs domestic Wyoming trona supply.

Required documents

  • TSCA Section 13 Import Certification statement on customs entry
  • OSHA-compliant SDS reflecting H319 classification
  • Customs entry CBP Form 7501 with HS code 283620 (sodium carbonate anhydrous) and Section 301 List 3 25% duty applied
  • FDA 21 CFR 184.1742 GRAS conformity declaration for food-grade lots
  • CDR filing every 4 years if site exceeds 25,000 lb/yr threshold

Common compliance traps

The pitfalls that have bitten importers on this lane in the past. None of these is theoretical.

  • **Light-regulatory profile**: NOT on TRI, NOT on Cal Prop 65, NOT on RMP, NOT on DEA
  • Possible active US AD/CVD on Russian-origin soda ash since 2024 (prior dataset cited case A-489-829 / C-489-830; verify against access.trade.gov before relying)
  • NO active US AD/CVD case on Chinese soda ash currently
  • Section 301 List 3 25% additional duty applies on Chinese-origin
  • **US is structurally net-EXPORTER** of soda ash through Wyoming Green River basin trona-route capacity (~13 Mt/yr; world's largest single-region trona producer)
  • Major US producers: Solvay-Wyoming, WE Soda, Sisecam Chemicals, Genesis Energy, Tata Chemicals Soda Ash Partners
  • Imports from Chinese supply have been minimal due to Section 301 cost layer + freight cost vs domestic Wyoming trona supply

Where to read next

For substance-level identifiers (formula, molecular weight, SMILES, InChIKey), GHS hazard profile, IMDG transport class, and full sourcing reference for sodium carbonate (soda ash), see the CAS 497-19-8 sourcing reference.

For grade-by-grade buying notes, freight maths, supplier-tier pricing, and a worked landed-cost example, the sodium carbonate (soda ash) cornerstone hub covers the full sourcing chain.

For the structure and history of TSCA, see the TSCA glossary entry.

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Read next

Cross-jurisdiction profile and sourcing references

Referenced in

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